Sealing-cap



R. E. BRUNS.

SEALING CAP.

APPLICATION FILED OCT. 9. I918. RENEWED OCT. 20. I920.

1,361,225. Patented Dec. 7, 1920;

plated is that of economy,

imirroqsr-Arss PATENT OFFICE.

Brennan 1:. nmmsior -,cnrcneo, rumors SEALING-CAP.

Application filed October's, 1918, Serial No. 257,443. Renewed October 20, 1920. Serial No. 418,841.

ence to an improvement on the construction disclosed in my co-pending application, Serial No. 220,142, filed March. 4, 1918. One of; the most important considerations in the manufacture of sealing devices for bottles of the character here contemnot only in manufacturing cost but in raw materials. It is commorr in packing certain food products to employ a relatively long cork for sealing the container and, in addition, to provide a metallic screwcap which inclosesthe bottle top. After the cork has been' removed,

however, it is discarded'and the metal capacts merely as a dust excluding device having no practical sealing effect. Thus the relatively large quantity of cork has no function other than that of initially sealing the container, and is, so far as the consumer is concerned, a waste product. 'In my ,construction I secure the sealingeifect by the use of a relatively thin disk of cork, which may, for the reasons hereafterexplained, 'be

. of cheap quality,furthermore, the disk continues to perform its functionv nal seal is broken. I

One of the fundamental after the origito corrode shall be permitted to-r'emain in contact withthematerial int-he .packa e and this has prevented the adoption of dis sealing constructions due to the difficulty in re taining the disk in proper relation to the cap.. If the disk was firmly secured to the cap the disk was necessarily rotated with in addition has numerous other advantages.

One of the important advantages of the present construction is' in that the cork disk is mechanically held in proper relation to the cap. This servesto avoidany drflicul principles observed by packers is. that no metal likely ties due to uncertainty of the connection by; adhesives. A further advantage is that.

the device will effectually seal the bottle notwithstanding any irregularities in the top edge. The cork disk which I' provide will be of such thickness.and resiliency as Specification of Letters Patent. Patented Dec. 7, 1920.

to overcome any slight imperfections in the finish of thebottle and s'ecurely'sea1 the conof the fact that the disk is applied to the top edge of the bottle and is not rotated after having been seated-thereon; there is therefore no grinding effect but a straight pressure, the screw-cap rotating on the antifriction head or rib provided on the upper surface of the disk container.

clamping force is applied at exactly the right point. Furthermore, the force 1s aptents-thereof. This is possible 'only because I v The .rib or anti-friction bead is locateddirectly above j the top edge of the bottle and therefore. the

5 plied near the periphery of the cap and thus stood by reference to the accompanyingv drawing, wherein, Figure 1 is a fragmentary elevation partly in section showing the cap-as'applied to a bottle of common form;

. Fig. 2 is an enlargedelevation of the cap,

' and, 1 '7 Figi 3 v sealing disk and its holder.

is a sectional view through .In the drawings it' will be seen that the a bottle 10, is of the usual form and is pro vided with'cast threads 11, thereon The the )0 v top edge 12, of the bottle is of the ,usual. I D

- roundedjform, no, change being necessary over the construction as furnished'hy the glass manufacturer. "This is an important feature as it requires no special shape.

The. bottleis sealed by means of a, screw cap comprising the cylindrical. threaded portion"l3,.the top wall 14, and the intermediate annular portion15. An important .is spun in the cap. thus avoiding the handling of a separate part such as shown in feature in the matter of economy in cost of 1 manufacture isthat, the annular portion 15 my prior application. Thesea'ling device also includes an imperforate cork or composition cork disk 16, wh'ch'a covers the top of the bottle and. is adapted to be com- 4 pressed as shown at 17, toftightly fit over act of forcing the disk Onto the top edge of the bottle is permitted because of the provision of -a correspondingly shaped recess 18, in the retaining evicefor the disk.- This retaining device mprises a metallic diskf portion 19, having the lateral annular bead 20, the concave side of-which provides the re ess 18. It also includesa downwardly and i wardly inclined marginal flang e'21, which terminates in a short diagonally projectingflange'22. The flange 21, provides a space the outlet from which is contracted and the corkdisk is forced into this space.

The flared flange 22, serves to assist in guiding the disk as it is forced into the retainer andyalso for the. purpose of engagin with I the adjacent wall 23, of the cap whic con-.

2 stitutes the bottom wall of the spun' enlargement 1 5. By this means the .dis is forced from engagement with the bottle when tlre screw-cap is retracted. a

- It will be noticed that the disk'is imperforateand'that it is firmly united with the cap by mechanical means." The retaining device and the cork disk do not rotatewith' the screw-cap and there is-therefore no tendency to grind the disk in event of anyun- '30 evenness in the top surface of the -bottle. The area of frictional resistance between the screw-cap andretainin disk is considerablyreglucedfby providingthe annular bead 20,

' 1 on the metallic retainer, and the concave side 85 of thebead'serves the vpurpgse of providing a recess within which, the materialof the sealing disk may be accommodated as the disk [is forced onto the extremity. of the bottld. The location of the'bead at the point 40 indicated is desirable as it is directly over .vthe extremity of the bottle and is near the .peripheryof the screwwap. Thus the force exerted by the screw-cap, tending toclamp the disk onto the;top of the bottle, is near 7 the sidewalls of the screw-cap and thereis ajreduced tendenc'yxto bend or distort the 1 *top wall 14,1of the screw-cap. In the use of this device it will be seen that the container may be effectually sealed each time it .is opened and" that the-screw-cap acts otherthan as a mere means for excluding dust. In. other-words, the invention comprises a sealing device operable throughout 'the life of the container, in which the'sealing'disk 5 5 is mechanically held in position, is not ro- I of, the container and in 3 which no metallic parts are in contact with.

. tatedon the to the substance within .thecontainer;

Iclaimn a gagement with'the extremity of-the retainer, 50 1.- In a sealing device for abottle having vice, substantially as described. 2. In a'seali'ng device for a container, the combination of a screw cap having an an-K nularenlargement spun in its closed inner end, a metallic retaining device, the flanged periphery of which occupies said enlarge- 'ment with capacity for limited freedom of. verticaltmovement, the flange on said re taining device defining an outwardly converging space, substantially asdescribed. 3. In a sealing device. the combination of a screw cap having an annular enlargement in its .closed end, a metallic retaining'device, the flanged periphery of which occupies said enlargement with capacity for limited freedom of vertical movement, an imp'erforate' -f cork disk, means for firmly uniting said .diskto, the retaining device, and an anti-friction bead provided on the retaining device near the periphery thereof, substantially as de- I scribed. a 4. In' a sealing device, the combination of a screw cap having an annular enlargement I in its closed end, an imperforat'e sealing disk, a disk retaining device, means on said retaining device for" providing an-outwardly s converging space within which the cork A Securing the cork disk in said retaining de'- disk is forced, and-means on the retaining device located in line with the end of. the bottle for permitting lateral deflection of the" cork disk to confo to the contour of the extremity of the be tle, substantiallyas described. I In a sealing deivice, the combination of v a screw cap having an annular enlargement 'inits closed end, a retaining device permanently held insaid enlargement with capac d it for limited freedom of movement, said retaining'device comprisin ametallic disk havingan'integral inturne marginal flan e, f an imperforate sealing. disk adapted to 1 T forced into? theitape'ring spacethusj formed and ans carried by the metallicdi k fq'r.

accommodating lateral deflectionofthe; cork disk to conform to the contour of the?"v riphery of the retainer, substantially as scribed. I Q'- 6. In a sealing device, thecombinationof a screw cap having an enlarged space inits closed ,end,' a retainingdev ce mountedfin said s ace, animperforatej'sealin disk means or mechanicallyuniting-the d1sk and the retaining device, anannular bead being formed on saidvretaining de'vice'at-a point near the periphery of the latter, saidbead providing a recess adapted to accommodate .theldefiection of the sealing .disk at its ensubstantially as described. v 1 1 Signed at Chicago, Ill., this 5th day of October, 1918. j p

.1. RICHAR D'E. BRUNS-,

Witness; i 

